The first paragraph of the passage introduces two groups of legal scholars on the level of indeterminacy that can be found in the law: modern legal scholars, and an earlier group known as the "realists."
The second paragraph introduces the realists viewpoint further and the last paragraph discusses the realists views in depth.
This is why answer choice (D) is correct: "Two viewpoints on an issue are briefly described and one of those viewpoints is discussed at greater length."
Answer choice (B) is incorrect because the passage never compares the two styles "point for point." Neither does the passage evaluate BOTH styles.
Hope that clears things up! Please let us know if you have any other questions.
